function Swiper (el) {
    this.el = document.querySelector(el)
    this.t = null
    this.num = 1
    this.init()
}
Swiper.prototype.init = function () {
    this.autoplay()
    this.over()
    // this.out()
}
Swiper.prototype.page = function (num) {
    this.el.querySelector('ul li.active').className = ''
    this.el.querySelectorAll('ul li')[num-1].className = 'active'
}
Swiper.prototype.autoplay = function () {
    this.t = setInterval(() => {
        this.num++
        if(this.num>6) this.num = 1
        this.el.querySelector('img').src = `./imgs/img${this.num}.jpg`
        this.page(this.num)
    }, 1000)
}
Swiper.prototype.over = function () {
    let ulLiObjs = this.el.querySelectorAll('ul li')
    ulLiObjs.forEach((item,i) => {
        item.onmouseover = () => {
            clearInterval(this.t)
            this.el.querySelector('img').src = `./imgs/img${i+1}.jpg`
            this.num = i+1
            this.page(this.num)
        }
        item.onmouseout = () => {
            this.out()
        }
    })
}
Swiper.prototype.out = function () {
    this.autoplay()
}
export default Swiper